What exactly does Bernouillis principle mean?
In non viscous fluid mechanics, there are essetially two principle in play : 1. the Principle of Continuity 2. The Bernoulli’s Principle The former states that the rate of flow of liquid is same throughout the length of a pipe etc. i.e A1 * V1 = A2 * V2 ( where A and V are the Area of Cross section and Velocity of liquid at different stages) Thus, when u squeeze the hose the A decreases and to maintain the equation the V has to increase. The Bernoulli’s Principle relates the Energies of two different stages : P1 + 1/2 p*V1*V1 + p*g*H1 = P2 + 1/2 p*V2*V2 + p*g*H2 Where P,p,H are the Pressure, density and Height. SURPRISINGLY, using the above eqn, we find that when we squeeze the hose, the PRESSURE actually decreases rather than what we think logically.
